docs: extend actor permission level env var (#2026)

Extends documentation for `ACTOR_PERMISSION_LEVEL` environmental
variable with inline example values.

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> Documents the `ACTOR_PERMISSION_LEVEL` environment variable in the
system variables table.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
fd00da9. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: stepskop

sources/platform/actors/development/programming_interface/environment_variables.md

@@ -54,7 +54,7 @@ Here's a table of key system environment variables:
 | `APIFY_HEADLESS` | If **1**, web browsers inside the Actor should run in headless mode (no windowing system available). |
 | `APIFY_IS_AT_HOME` | Contains **1** if the Actor is running on Apify servers. |
 | `ACTOR_MEMORY_MBYTES` | Size of memory allocated for the Actor run, in megabytes. Can be used to optimize memory usage or finetuning of low-level external libraries. |
-| `ACTOR_PERMISSION_LEVEL` | [Permission level](../../running/permissions.md) the Actor is run under. This determines what resources in the user’s account the Actor can access. |
+| `ACTOR_PERMISSION_LEVEL` | [Permission level](../../running/permissions.md) the Actor is run under (`LIMITED_PERMISSIONS` or `FULL_PERMISSIONS`). This determines what resources in the user’s account the Actor can access. |
 | `APIFY_PROXY_PASSWORD` | Password for accessing Apify Proxy services. This password enables the Actor to utilize proxy servers on behalf of the user who initiated the Actor run. |
 | `APIFY_PROXY_PORT` | TCP port number to be used for connecting to the Apify Proxy. |
 | `APIFY_PROXY_STATUS_URL` | URL for retrieving proxy status information. Appending `?format=json` to this URL returns the data in JSON format for programmatic processing. |